2109680 has 20 divisors (see below), whose sum is σ = 4905192. Its totient is φ = 843840.

The previous prime is 2109671. The next prime is 2109697. The reversal of 2109680 is 869012.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13106 + ... + 13265.

2^2109680 is an apocalyptic number.

2109680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2109680 is an abundant number, since it is smaller than the sum of its proper divisors (2795512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2109680 is a wasteful number, since it uses less digits than its factorization.

2109680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26384 (or 26378 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 2109680 is about 1452.4737519143. The cubic root of 2109680 is about 128.2543769492.

The spelling of 2109680 in words is "two million, one hundred nine thousand, six hundred eighty".